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Attaching wood to tile....

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Ok, I have waited for the wood in my new 56G column to sink for well over a month. 2 pieces are still very buoyant. I do not have the mechanical ability to really attach the wood to tiles via SS screws. I had contemplated using Epoxy to attach the wood to tiles...would this feasibly work? Also is regular epoxy from Lowes/Walmart safe? It looks just like the stuff I have purchased from reef supply stores in the past.

Stuff is beyond strong and will probably never break-like I repaired a broken headlight mount on my car, and it was stronger than the non broken one. lol
-I'm not sure how safe it is after it sets and is underwater, but that could be solved with a clear coat of a sealer that is aquarium safe product?

another option:
alter the decor set up to use rocks to weigh the piece down?

I would probably drill a hole in the tile and put a screw thru the tile into the driftwood. Just sounds like a safer plan. I don't know if I could fully trust the glue/epoxy to hold the wood in place. What would happen if the epoxy failed and the driftwood would pop to the surface or thru the top?

The shape of the wood has made it very difficult to get it firmly anchored with other decor. My hope was the epoxy would hold it down long enough to become water logged. It has popped up and down many times without any negative effects. I would just like to get this done over the weekend as I am very tired of looking at a bare ugly tank full of tannin water and floating wood.

I used aquarium silicone to glue a couple pretty large pieces of driftwood down on eggcrate. It has held for over a year now. I don't know the shape of the wood and if it would have an area big enough to use silicone but just throwing this option out there for you.

When I go fishing I just place a sharp rock in the water and sit there waiting for all the dead fish to float to the top... KingfisherBrutal honesty will be shown on this screen.I think my fish is adjusting well to the four gallon, He's laying on his side attempting to go to sleep on the bottom of the gravel.Tolerance is a great thing to have, so is the ability to shut up.I can explain it to you, but I can't understand it for you.

I use aluminium bonsai training wire of 1.5mm diameter
wrapped around wood once and then around a tile or piece of slate a couple of times. If the wire is visible after I'm certain the wood is no longer buoyant it can be cut away using household scissors. I've used this wire for various applications in freshwater tanks and never noticed any adverse effects.

I've used silicone on wood that was already saturated. I just used a hair dryer to dry the area I needed to put the silicone, it worked fine.

When I go fishing I just place a sharp rock in the water and sit there waiting for all the dead fish to float to the top... KingfisherBrutal honesty will be shown on this screen.I think my fish is adjusting well to the four gallon, He's laying on his side attempting to go to sleep on the bottom of the gravel.Tolerance is a great thing to have, so is the ability to shut up.I can explain it to you, but I can't understand it for you.

I tried using aquarium epoxy to hold down my it-will-never-sink driftwood and it didn't work- don't waste your time with epoxy. Aquarium sealant worked great attaching my wood to slate. Just make sure to use enough and let it cure for 24 hours before putting it in your tank.